Square D Motor Logic Solid State Overload Relay Lug Extender Kit, 600V

Square D Motor Logic Solid State Overload Relay Lug Extender Kit, 600V

The Square D Motor Logic solid state overload relay lug extender kit (9999LB0) protects 50/60 Hz, 3 phase AC motors from overload, phase unbalance, and phase loss conditions. Built for retrofit NEMA Type S motor starter applications, this kit gives panel builders and electricians a reliable path to upgrade existing starters without a full starter replacement. Rated for 600V AC operation, it is engineered for demanding commercial and industrial motor control environments where dependable overload protection is critical.

Key Features

• Retrofit Compatibility: Designed for retrofit NEMA Type S motor starter applications, simplifying upgrades without full starter replacement.
• Solid-State Overload Protection: Protects 50/60 Hz, 3 phase AC motors from overload, phase unbalance, and phase loss conditions.
• Rated Operational Voltage: 600V AC for use in demanding industrial and commercial systems.
• Simple Installation: Straightforward setup reduces labor time on retrofit jobs.
• Field-Interchangeable Thermal Units: Supports field interchangeable thermal units for replacement motor installations.
• Flexible Mounting: Available as direct mount or separate mount to fit varied panel layouts.
• Broad Starter Compatibility: Comes standard installed on both non-reversing and reversing, as well as combination and multispeed starters.
• Equipment Protection: Provides thermal protection for the most costly motor equipment in a facility.

Certifications & Compliance

• EU RoHS: Pro-active compliance (product out of EU RoHS legal scope)
• China RoHS: Product out of China RoHS scope; substance declaration available

Technical Specifications

• Product Type: Overload Relay Accessory
• Voltage Rating: 600V

Typical Applications

• NEMA Type S Motor Starter Retrofits
• Industrial Motor Control Panels
• OEM and Panel Builder Starter Assemblies
• Non-Reversing and Reversing Motor Starters
• Combination and Multispeed Starter Systems
• Replacement Motor Installations

Why Square D?

Square D Motor Logic overload relay components are engineered for dependable, code-conscious performance across industrial and commercial motor control applications. With field-interchangeable thermal units, flexible mounting options, and broad compatibility across starter configurations, this lug extender kit helps panel builders and electricians keep critical motor equipment protected during retrofits and replacements.